I can see the offer in Coinkite store and they talk of how weak hands are selling due to the crazy and uncertain global economic situation right now, so they are giving 20% to help customers hodl, lol, good marketing.
If they wanted to offer new customers discounts on their products, they could have simply done that without the rest of the drama about weak hands selling, global economic uncertainty, and the rest of it. It was unneeded. Anyways, the offer has expired and is no longer available. Seems like it was just a 24/48-hours special deal.